A company manufactures steel tubes with an average circumference of 12.5 cm. The maximum divergence allowed is 0.15 cm. The

Question

A company manufactures steel tubes with an average circumference of 12.5 cm. The maximum divergence allowed is 0.15 cm. The circumference of the tubes follow a normal distribution with standard deviation 0.09 cm. What percentage of tubes have an unacceptably large circumference?

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